METHOD FOR PREPARING TRANSITION METAL COMPLEXES, TRANSITION METAL COMPLEXES PREPARE USING THE METHOD, CATALYTS COMPOSITION CONTAINING THE COMPLEXES
申请人:Lee Choong-Hoon
公开号:US20100062927A1
公开(公告)日:2010-03-11
The present invention provides a novel transition metal complex where a monocy-clopentadienyl ligand to which an amido group is introduced is coordinated, a method for synthesizing the complex, and olefin polymerization using the same. The method for preparing a transition metal complex according to the present invention comprises a step of blocking a by-reaction of a nitrogen atom using a compound containing a protecting group, and thus it is possible to prepare a transition metal complex in a simpler manner in a high yield. Further, the transition metal complex according to the present invention has a pentagon ring structure having an amido group connected by a phenylene bridge in which a stable bond is formed in the vicinity of a metal site, and thus, sterically monomers can easily approach the transition metal complex. When a catalyst composition comprising the transition metal complex is applied in copoly-merization of ethylene and monomers having large steric hindrance, a very low density polyolefin copolymer having a density of less than 0.910 g/cc, in addition to a polyolefin having a high molecular weight and a linear low density, can be prepared. Furthermore, the reactivity is also very high.
本发明提供了一种新型过渡金属配合物,其中配位了一个含有氨基基团的单环戊二烯基配体,以及一种合成该配合物的方法,以及使用该配合物进行烯烃聚合的方法。根据本发明的制备过渡金属配合物的方法包括通过使用含有保护基团的化合物阻止氮原子的副反应的步骤,因此可以以较高的产率简单地制备过渡金属配合物。此外,根据本发明的过渡金属配合物具有一个五角环结构,其中通过苯桥连接的氨基基团在金属位点附近形成了一个稳定的键,因此,立体单体可以轻松接近过渡金属配合物。当应用含有过渡金属配合物的催化剂组合物在乙烯和具有较大立体位阻的单体的共聚合中时,可以制备出密度小于0.910g/cc的超低密度聚烯烃共聚物,除了具有高分子量和线性低密度的聚烯烃外,反应性也非常高。